Revenues

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Revenues

5. Revenues

The following tables present the Company’s net revenues disaggregated by geography based on the location of the customer, by product line (in thousands):

	Three Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
United States	$	18,229	$	15,827	$	34,056
Europe		6,955		6,034		12,989
Asia Pacific		13,127		45,619		58,746
All other		923		33		956
	$	39,234	$	67,513	$	106,747

	Six Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
United States	$	39,485	$	29,537	$	69,022
Europe		14,501		10,061		24,562
Asia Pacific		29,974		79,063		109,037
All other		1,799		143		1,942
	$	85,759	$	118,804	$	204,563

	Three Months Ended June 30, 2022
	Brick Products		Advanced Products		Total
United States	$	18,668	$	12,782	$	31,450
Europe		5,041		2,229		7,270
Asia Pacific		9,846		52,550		62,396
All other		968		102		1,070
	$	34,523	$	67,663	$	102,186

	Six Months Ended June 30, 2022
	Brick Products		Advanced Products		Total
United States	$	32,729	$	23,408	$	56,137
Europe		12,083		4,997		17,080
Asia Pacific		23,367		92,045		115,412
All other		1,701		138		1,839
	$	69,880	$	120,588	$	190,468

The following tables present the Company’s net revenues disaggregated by the category of revenue, by product line (in thousands):

	Three Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	24,435	$	55,556	$	79,991
Stocking distributors, net of sales allowances		14,338		6,345		20,683
Non-recurring engineering		461		2,796		3,257
Royalties		—		2,456		2,456
Other		—		360		360
	$	39,234	$	67,513	$	106,747

	Six Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	54,921	$	97,569	$	152,490
Stocking distributors, net of sales allowances		30,075		11,397		41,472
Non-recurring engineering		763		4,924		5,687
Royalties		—		4,476		4,476
Other		—		438		438
	$	85,759	$	118,804	$	204,563

	Three Months Ended June 30, 2022
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	23,566	$	61,979	$	85,545
Stocking distributors, net of sales allowances		10,908		3,102		14,010
Non-recurring engineering		49		1,908		1,957
Royalties		—		656		656
Other		—		18		18
	$	34,523	$	67,663	$	102,186

	Six Months Ended June 30, 2022
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	47,967	$	109,450	$	157,417
Stocking distributors, net of sales allowances		21,672		6,846		28,518
Non-recurring engineering		241		3,294		3,535
Royalties		—		962		962
Other		—		36		36
	$	69,880	$	120,588	$	190,468

The following table presents the changes in certain contract assets and (liabilities) (in thousands):

	June 30, 2023			December 31, 2022			Change
Short-term deferred revenue and customer prepayments	$	(6,620	)	$	(13,197	)	$	6,577
Long-term deferred revenue		(1,761	)		(145	)	$	(1,616	)
Deferred expenses		30			577		$	(547	)
Sales allowances		(2,571	)		(1,661	)	$	(910	)

Deferred expenses are included in Other current assets in the accompanying Condensed Consolidated Balance Sheets.

The Company records deferred revenue, which represents a contract liability, when cash payments are received or due in advance of performance under a contract with a customer. The Company recognized revenue of approximately $2,236,000 and $3,845,000 for the three and six months ended June 30, 2023, respectively, and $1,136,000 and $931,000 for the three and six months ended June 30, 2022 that was included in deferred revenue at the beginning of the respective period.